HEY FD guys im an 10th ae owner..much love to all for your beautiful cars....ok i have a friend thats pushing like 500+hp and i drove his car the other day and noticed that it was kinda hard to shift=kinda like mine when i put the short shifter in with old old tranny fluid= i kno that when i switched to redline mt90 that mine was like butter...the ? is what kind of fluid should he use, he can get royal purple cheap as hell...so let me kno what your guys fav. is really app/ it

 

Just use royal purple. Cost should not be an issue when determining fluids. Well, to some extent.